Htabtin ereund



Patented Sept. 25, 1923.

MARTIN renown, Dncnnsnn, LATE or FnAnKron'r-oN rrHE-Mam, GER ANY; BY WALTER FB-EUNID, amvrrnrs'rneron, or rnAnKroR'r-on-THE Anv, GERMANY, AND EDMUND srnYnn, orrn NKFon'r-oN-trHE-MAI GER-MANY.

ISOIJIERIC PRODUCT OF REDUCTION OF OXYCODEINOIiT 'AND' PROCESS OF PREPARING THE SAME.

No Drawing.

1916, Patent No. 296,916; Austria, filed December 9, 1916, Patent No. 7 5,7 10; Hungary, filed December 9, 1916, Patent No. 71,587; Switzerland, filed December 7, 1916, Datents Nos. 75,110 and 75,625 and 76,049; Spain, filed August 18, 1920, Patent No. 7 2,- 708; Czechoslovakia, filed February 10, 1920, Patent No. 2,228; Norway, filed December 30, 1919, Patent No. 31,850; Italy, filed February 23, 1920, Serial No. 288/44; Netherlands, filed December 31, 1919, Serial Nos. 16,685, 15,089, and 15,090; Denmark, filed December 29, 1919, Serial Nos. 3,498/19, 2,265/19 and 2,266/19; and Sweden, filed January 20, 1920, Serial No. 16 1/20), of which the following is a clear, full, and exact description.

The subject of this invention is dihydrooxycodeinon, an unknown derivative of oxycodeinona product described in the German Letters Patent No. 286,431-and distributed metal of the platinum group or a colloidal solution of these metals.

Dihydrooxycodeinon produced in such manner crystallizes from alcohol in long jagged columns melting at 222 C. and yields well crystallized salts. Its hydrochloride c H NO HCll crystallizes from water or diluted alcohol in columns melt- Application filed July 15, 1921. Serial No. 485,130.

ing at 268to 270 C. Its free base is pre cipitated from solutionsof its salts by ammonia, soda or alkalies; it is insoluble in excess of alkalies. It combines with methyl iodide to form C, H NO,.CH J, representing prisms decomposing at 251 C.

of an oxime, the hydrochloride of which:

Its .ketone character is shown by the formation 7 C, H N O .HCl is isolated in small sticks decomposing at 275 to 278 C. i

The new dihydrooxycodeinon is to be used in medicine and pharmacy.

Emma Zes.

1a. 10 grins. oxycodeinon are dissolved in diluted acetic acid. After adding a little platinum black and water to make up 100 c. c., the solution is shaken with hydrogen gas; after about 4 hours absorption has taken place conforming to onemolecule of hydrogen. Separating the platinum by filtration, the acetic acid solution,- being overthe filtered solution with'ammonia, dihydrooxycodeinon is precipitated.

The base possesses the following addi-, tional pi'operties; it is readily soluble in alcohol or chloroform, but with great dif- V ficulty soluble in ether or water.

Having thusdescribed the invention, what is claimed is 1. The process of preparing dihydrooxycodeinon, melting at 222 G, which con-' sists in reducing oxycodeinon in an acetic acid solution by molecular hydrogen in the presence of a metal catalyst of the platinum group.

2. The process of preparing dihydrooxycodeinon, melting at 222 (1, whichcom' presence of a finely distributed metal of the platinum group. 7

3. The process of preparing dihydrooxycodeinon, melting at 222 (1., which consists inreclucing oxycocleinon in an acetic acid solution by molecular hydrogen in the presence of a colloidal solution of a metal of the platinum group.

In testimony whereof We have hereunto Privatrlgent Dr. EDMUND lSPEY ERf \Vitnesses PROFESSOR N. FJNAGLE, Dr. FLHAHNL 

